Hal Leonard Corp., a Milwaukee-based music publisher, said Friday that it has arranged to supply drums, cymbals and other equipment to Summerfest as the official supplier of percussion gear to the "world's largest music festival." Under the pact, Hal Leonard will supply Gretsch drums, Gibraltar drum hardware, Remo drumheads and Paiste cymbals for the dozen stages at Summerfest, which will host more than 800 bands over the 11-day music festival starting June 26. Hal Leonard also continues its sponsorship...